The bedroom assassin is a henchmen for Mr Osato, portrayed by David Toguri in the film You Only Live Twice.
He is sent to kill Dikko Henderson before he tells Bond about the Osato Chemicals being involved in SPECTRE’s plans. After Henderson dies, Bond chases the assassin and kills him with his own switchblade. Seeing a getaway car is near, Bond takes the assassin’s clothes and mask and climbs into the backseat so the driver takes him to the assassin’s origins.